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Astronomers have a massive breakthrough as they discover a weird and very bright extraordinary object in the far reaches of our solar system. Is it a planet? Is it a block of ice? Whatever it is, it's bigger than Pluto. Fascinating science video from BBC Horizon show 'Bye Bye Planet Pluto.'

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  • Eris (planet)

    Add Image Eris is the largest known dwarf planet in the Solar System and the ninth largest body...

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current01:27, March 17, 2015Thumbnail for version as of 01:27, March 17, 2015480 × 269 (16 KB)Miley Spears (Talk | contribs)created video